Grease gun



Nov. 2, 1937. A. w. ARNOLD GREASE GUN Filed July 27, 1955 75 be. 116k! ealf'ect.

Patented Nov. 2, 1937 p UNITED STATES GREASE GUN V Albert W. Arnold, Miami, Fla. Application July 2'7, 1935, Serial No. 33,589 7 Claims. (01. 221-473) My invention relates to an improved system other lubricant for that matter, is required, the or method of and mechanismfor lubrication. gun or pump is attached to the receptacle, con- The usual equipment for the various types of taining that particular lubricant. Then oil or lubrication requires in the neighborhood of siX other fluid is forced from the pump or gun, grease guns, with all its attendant expense. through the hose 1, and the duct 6, into the re- The purpose of my invention is to provide a ceptacle under pressure of perhaps three thouseries of receptacles each of which is charged sand or more pounds to the square inch, into with a separate lubricant, so that a detachably the space between the piston and the cap 3,thereconnectedpump or gun may be applied to the by moving the piston forward through the re-. receptacle containing the desired lubricant, when ceptacle, thus creating a forced feed pressure 10 the lubricant is to be forced therefrom, thus against the thick lubricant contained in the remaking a single gun serve the purpose of perhaps ceptacle, causing it to discharge through the fiv r x p r n as ha h h r o b n nozzle 2, and to be delivered to the part to be ATE QFFICE customary. lubricated. In the accompanying drawing, e To refill or recharge the receptacle after the 15 1 is a IOHgitlldinal ec a d supply of lubricant shall have been exhausted,

Fi 2 s a tra s s section on the l n the cap 3 is removed, the rod 4 is withdrawn of looking n the d on o the a rows bringing with it the piston, the receptacle is re- The numeral I, represents the receptacle. charged with lubricant, the piston is reinserted This receptacle has a discharge nozzle 2 at one back of the lubricant, the rod is pushed through 20 end, and a cap 3 removably secured, as for inthe piston, and the cap is secured on the open end stance, screwed to the filling end. of the receptacle. The receptacle is now charged A rod 4 is screwed into a threaded orifice 5 in and ready for further use. the center of the cap 3. I claim: 7 Through the axial center of the rod 4, an inlet 1. A lubricating device comprising a cylinder, 25

duct 6 is formed, and a hose 1 from the pump or and a piston operatively mounted therein, said gun is p d to be detachably p d to the piston including a disk having opposite conical outer end of this rod. faces and packing cups on opposite sides of the A piston is fitted to the wall of the receptacle disk and turned in opposite directions, and is not only slidably mounted in the receptacle 2. A lubricating device comprising a cylinder, 30

bu it is a so d y mounted on h C t a y and a piston operatively mounted therein, said located rod 4, and the head 8 on the inner end of piston including a sleeve, a disk mounted therethe rod forms a stop for the piston when it is on and having opposite conical faces, and packmoved to discharge the lubricant. ing cups on opposite sides of the sleeve in front The piston may be variously constructed, but of the conical faces and turned in opposite di- 35 as illustrated, includes a sleeve 9, having threaded rections. ends, and a disk Hi preferably having conical 3. A lubricating device comprising a cylinder, faces, mounted on the sleeve, and packing cups ii and a piston operatively mounted therein, said opening in opposite directions and backed against piston including a sleeve, a disk mounted thereon the disk H where they are held by washers I2 and having opposite conical faces, packing cups 40 and nuts 13, screwed on the threaded ends of on opposite sides of the sleeve in front of the the sleeve 9. conical faces and turned in opposite directions, To fill the receptacle with lubricant, the cap and a rod fixed to one end of the cylinder and 3 is removed, that is to say unscrewed, and the extending therein and slidably receiving the rod 4 is pulled out; the head 8 coming in contact sleeve of the piston. 45 with the piston, causes the piston to move with l. A lubricating device comprising a cylinder, the rod and to be removed from the receptacle. and a piston operatively mounted therein, said The receptacle is then filled with the selected piston including a disk having opposite conical lubricant, the piston is then reinserted in the faces, and packing cups secured on opposite sides 0 open end of the receptacle, and after sliding the of the disk in front of said faces. rod t through the piston, the cap 3 is screwed 5. A lubricating device comprising a cylinder, on the end of the receptacle. The receptacle is a piston operatively mounted therein and innow loaded with lubricant and ready for use. eluding asingle diskhaving opposite conical faces, When the particular lubricant contained in the and packing cups secured at their inner edges on receptacle, for example, chassis lubricant or any opposite sides of the disk in front of said faces 55 and turned in opposite directions, said piston being adapted at one side to force a lubricant from one end of the cylinder, and means for admitting a fluid under pressure to the cylinder at the opposite side of the piston.

7. A lubricating device comprising a cylinder, a guide rod having one end fixed in one end of the cylinder and extending lengthwise therein with an abutment on the opposite end of said rod, said rod having a duct in the fixed end opening into the cylinder for supplying fluid under pressure thereto, a piston slidably mounted on the guide rod and including a single disk having opposite conical faces with packing cups secured at their inner edges on opposite sides of the disk in front of and having the major portions thereof normally spaced from said faces, said cups being turned in opposite directions and being respectively pressed against said faces upon the application of pressure.

ALBERT W. ARNOLD. 

